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Highlights
Best Use: Backpacking
Performance: 3 Season
Weight: 1lb 11.6oz | 782g
Compressed Volume: 5.5L
Lower Temp Rating: 30°F | -1°C
Performance
- Ultralight
- Lightweight
- Midweight
- Ultra Compact
- Compact
- Midsize
- Warm
- Cold
- Extreme Cold
About The Product
Our most versatile sleeping bag. In colder temperatures you can cinch down the technical hood, zip up the draft-tube protected zippers and allow the 750+ Ultra-Dry Goose Down to keep you warm. In warmer conditions, the Free-Flow Zip system lets you unzip in different configurations for superior ventilation and even open up flat to turn the Ascent sleeping bag into a quilt on the warmest of nights.
All of the above make the Ascent a true three-season backcountry bag, one of very few on the market. Close the snaps at the shoulders, open the footbox zipper and wear the Ascent at camp - hardcore adventures don't have to be hard all the time.
Product Features
- RDS-certified, 750+ fillpower goose down with a non-PFAS Ultra-Dry Down treatment to stay drier in damp conditions
- Free-Flow Zip System offers excellent temperature regulation and multiple sleeping bag configurations
- Thermally-efficient, more relaxed mummy fit, room in the hood to fit an Aeros pillow and the option to zip couple with a compatible Sea to Summit Women's bag to deliver space for two comes standard
Shipping & Returns
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Find Locally
Sea to Summit tests its sleeping bags for their temperature rating using the ISO 23537 test protocol. This test gives two key ratings: Lower Limit and Comfort Rating.
Lower Limit: The lowest temperature at which a man should stay warm.
Comfort Rating: The lowest temperature at which a woman should stay warm.
Sea to Summit Women’s-specific sleeping bags are listed using the Comfort Rating. Unisex bags are listed using the Lower Rating. For example, if the bag is rated at Lower Limit of 14°F | -10°C and Comfort rating of 27°F | -3°C, it should keep a woman warm down to 27°F | -3°C and a man warm down to 14°F | -10°C, if they are wearing warm clothes and using a good sleeping pad.
Remember: These ratings are just guidelines. Movement, weather, and your gear setup can all affect how warm you actually stay.
Pro Tip: Think of your sleeping bag, pad, and liner as a system. If you expect 28°F | -2°C weather, choose a sleeping bag rated for 23°F | -5°C, use a sleeping pad with an R-Value of 3 or more, and add a liner for extra warmth.
Ascent Down Sleeping Bag 30°F / Regular
- RDS-certified, 750+ fillpower goose down with a non-PFAS Ultra-Dry Down treatment to stay drier in damp conditions
- Free-Flow Zip System offers excellent temperature regulation and multiple sleeping bag configurations
- Thermally-efficient, more relaxed mummy fit, room in the hood to fit an Aeros pillow and the option to zip couple with a compatible Sea to Summit Women's bag to deliver space for two comes standard
- Lightweight 20D recycled nylon shell with a non-PFAS DWR finish to protect against wind and moisture and a 20D recycled nylon liner for greater comfort
- Box baffle construction throughout with vertical baffles in the torso to minimize down shift and maximize the retention of warmth
- Sea to Summit Guarantee is offered for the Lifetime of this product
Technical Features
750+ Loft Ultra-Dry Down
Free Flow Zip
Responsible Down Standard (RDS)
Non-PFAS
Tech specs
-
Best UseBackpacking
-
Comes With40D recycled, bluesign APPROVED nylon compression bag
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InsulationRDS certified, 750+ non-PFAS Ultra-Dry Down
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ShapeRelaxed mummy
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Zip OptionsFree-Flow zipper system
| 30°F Regular | 30°F Long | 15°F Regular | 15°F Long | |
|---|---|---|---|---|
| Bag Weight | 1lb 11.6oz 782g | 1lb 15oz 897g | 2lbs 4oz 1020g | 2lbs 8.8oz 1157g |
| Compressed Volume | 5.5 L5.5 L | 6.4 L6.4 L | 7.5 L7.5 L | 8.0 L8.0 L |
| Compression Sack | 8 L8 L | 8 L8 L | 13 L13 L | 13 L13 L |
| Fill Weight | 10.6 oz 300 g | 12.1 oz 343 g | 19.0 oz 540 g | 21.8 oz 617 g |
| Fits Up To Height | 6 ft 1 in 185 cm | 6 ft 6 in 198 cm | 6 ft 1 in 185 cm | 6 ft 6 in 198 cm |
| Temperature Rating (ISO Lower Limit) | 30°F -1°C | 30°F -1°C | 15°F -9°C | 15°F -9°C |
| Women's Temp Rating (ISO Comfort) | 38°F 3°C | 38°F 3°C | 29°F -2°C | 29°F -2°C |
Excellent insulation and warmth
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Frequently Asked questions
Is the Ascent suitable for colder weather?
Is the Ascent comfortable in warmer weather?
Can the Ascent be zipped to another sleeping bag?
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